Payload has a tenant authorization bypass in Multi-Tenant Plugin

{
  "id": "19df908476326aeee29989a0c9a5c5775985ec9720e13af17f12272ffa7d8f2e",
  "url": "https://osv.dev/vulnerability/GHSA-p96c-xwx8-3cqj",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "Payload has a tenant authorization bypass in Multi-Tenant Plugin",
    "summary": "## Impact When using the default tenant array field access, an authenticated user could assign themselves to other tenants. **You are affected if:** - You are using `@payloadcms/plugin-multi-tenant` If you configure the tenants arrayFieldAccess.create/update functions, a secured replacement membership field, you are not affected by this specific default behavior. ## Patches Users should upgrade Payload packages to `>= 3.90.0` or `>= 4.0.0-canary.34`. ## Workarounds Configure tenants arrayFieldAccess.create and tenants arrayFieldAccess.update so only trusted users authorized for all tenants can modify memberships.",
    "evidence": "osv:GHSA-p96c-xwx8-3cqj",
    "products": [
      {
        "name": {
          "value": "@payloadcms/plugin-multi-tenant",
          "evidence": "/affected/0/package/name"
        },
        "prerequisites": [],
        "fixed_versions": [
          {
            "value": "3.90.0",
            "evidence": "/affected/0/ranges"
          }
        ],
        "affected_versions": []
      },
      {
        "name": {
          "value": "@payloadcms/plugin-multi-tenant",
          "evidence": "/affected/1/package/name"
        },
        "prerequisites": [],
        "fixed_versions": [
          {
            "value": "4.0.0-canary.34",
            "evidence": "/affected/1/ranges"
          }
        ],
        "affected_versions": []
      }
    ],
    "severity": "high",
    "structured": {
      "id": "GHSA-p96c-xwx8-3cqj",
      "aliases": [
        "CVE-2026-105860",
        "GHSA-p96c-xwx8-3cqj"
      ],
      "metrics": [
        {
          "type": "CVSS_V4",
          "score": "CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:H/VA:N/SC:N/SI:N/SA:N"
        }
      ],
      "affected": [
        {
          "ranges": [
            {
              "type": "SEMVER",
              "events": [
                {
                  "introduced": "0"
                },
                {
                  "fixed": "3.90.0"
                }
              ]
            }
          ],
          "package": {
            "name": "@payloadcms/plugin-multi-tenant",
            "purl": "pkg:npm/%40payloadcms/plugin-multi-tenant",
            "ecosystem": "npm"
          },
          "database_specific": {
            "source": "https://github.com/github/advisory-database/blob/main/advisories/github-reviewed/2026/10/GHSA-p96c-xwx8-3cqj/GHSA-p96c-xwx8-3cqj.json"
          }
        },
        {
          "ranges": [
            {
              "type": "SEMVER",
              "events": [
                {
                  "introduced": "4.0.0-canary.0"
                },
                {
                  "fixed": "4.0.0-canary.34"
                }
              ]
            }
          ],
          "package": {
            "name": "@payloadcms/plugin-multi-tenant",
            "purl": "pkg:npm/%40payloadcms/plugin-multi-tenant",
            "ecosystem": "npm"
          },
          "database_specific": {
            "source": "https://github.com/github/advisory-database/blob/main/advisories/github-reviewed/2026/10/GHSA-p96c-xwx8-3cqj/GHSA-p96c-xwx8-3cqj.json"
          }
        }
      ],
      "modified": "2026-10-07T20:45:05.342379505Z",
      "provider": "osv",
      "references": [
        "https://github.com/payloadcms/payload/security/advisories/GHSA-p96c-xwx8-3cqj",
        "https://nvd.nist.gov/vuln/detail/CVE-2026-105860",
        "https://github.com/payloadcms/payload/commit/19b58692d20d3947f31124bf7a88ac14a5ebf02e",
        "https://github.com/payloadcms/payload",
        "https://github.com/payloadcms/payload/releases/tag/v3.90.0"
      ],
      "provider_metadata": {
        "cwe_ids": [
          "CWE-862"
        ],
        "severity": "HIGH",
        "github_reviewed": true,
        "nvd_published_at": "2026-10-06T17:17:22Z",
        "github_reviewed_at": "2026-10-07T20:29:53Z"
      }
    },
    "related_cves": [
      {
        "value": "CVE-2026-105860",
        "evidence": "/aliases"
      }
    ],
    "security_relevant": true,
    "severity_evidence": "/database_specific/severity"
  },
  "source_id": "core-osv",
  "document_id": 97266,
  "published_at": "2026-10-07T20:29:53+00:00"
}